Method for controlling an optical recording device for improved recording mark detection

Abstract

It is an object of the present invention to reduce a data error ratio in the mark edge recording method. In this invention, a corrected value of a record pulse is set by checking the data recording characteristics of an optically recording medium. For this reason, it is possible to adjust a length of a record mark to a specified value as well as to suppress errors such as data errors when data is regenerated.

What is claimed is: 
     
       1. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, and which includes an initial set-up method comprising the steps of: recording a first recording pattern having a short record mark length and a second recording pattern having a long record mark respectively in a specified area of an optical recording medium;   regenerating the first recording pattern and the second recording pattern respectively;   detecting a first amplitude value corresponding to an amplitude of a regenerative signal for the first recording pattern, and a second amplitude value corresponding to an amplitude of a regenerative signal for the second recording pattern; and   setting a corrected value of a pulse width of a record pulse so that a quotient obtained by dividing the first amplitude value by the second amplitude value is equal to or larger than a specified value;   wherein said initial set-up method is executed just after power for the device is turned ON.   
     
     
       2. An optical recording device control method according to claim 1, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       3. An optical recording device control method according to claim 1, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       4. An optical recording device control method according to claim 1, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       5. An optical recording device control method according to claim 1, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       6. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, comprising: an initial set-up process for setting a corrected value of a record pulse in a specified initial value;   an amplitude value checking process for detecting a first amplitude value corresponding to an amplitude of a regenerative signal for a first record pattern, and a second amplitude value corresponding to an amplitude of a regenerative for a second record pattern, by recording the first recording pattern having a short record mark and the second recording pattern having a long record mark in a specified area of the optical recording medium respectively and regenerating the first recording pattern and the second recording pattern;   an amplitude ratio discriminating process for checking that a quotient obtained by dividing the first amplitude value obtained in the amplitude value detecting process by the second amplitude value is equal to or more than a specified value; and   a control process for repeating the amplitude value checking process, when the quotient obtained in the amplitude value ratio discriminating process is smaller than a specified value, after a corrected value of the record pulse is reset.   
     
     
       7. An optical recording device control method according to claim 6, wherein a series of processes started from the initial set-up process is executed just after power for the device is turned ON. 
     
     
       8. An optical recording device control method according to claim 6, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       9. An optical recording device control method according to claim 6, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       10. An optical recording device control method according to claim 7, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       11. An optical recording device control method according to claim 7, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       12. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, and Which includes an initial set-up method comprising the steps of; recording a first recording pattern having a short record mark and a second recording pattern having a long record mark in a specified area of the optical recording medium respectively;   regenerating the first recording pattern and the second recording pattern respectively;   detecting a first middle point value corresponding to a middle point of an envelop of a regenerative signal for the first recording pattern, and a second middle point value corresponding to a middle point of an envelop of a regenerative signal for the second recording pattern; and   setting a corrected value of a pulse width of a record pulse so that a difference obtained by subtracting the second middle point value from the first middle point value is not more than a specified value.   
     
     
       13. An optical recording device control method according to claim 12, wherein a series of processes started from the initial set-up process are executed just after power for the device is turned ON. 
     
     
       14. An optical recording device control method according to claim 12, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       15. An optical recording device control method according to claim 12, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       16. An optical recording device control method according to claim 12, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       17. An optical recording device control method according to claim 12, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       18. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, comprising: an initial set-up process for setting a corrected value of a record pulse in a specified initial value;   a middle point value detecting process for detecting a first middle point value corresponding to a middle point of an envelop of a regenerative signal for a first recording pattern, and a second middle point value corresponding to a middle point of an envelop of a regenerative signal for a second recording pattern, by recording the first recording pattern having a record mark length and the second recording pattern having a long record mark length in a specified area of the optical recording medium respectively and regenerating the first recording pattern and the second recording pattern respectively;   a middle point value difference discriminating process for checking that an absolute value of a difference obtained by subtracting the first middle point value from the second middle point value in the middle point value detecting process is not more than a specified value; and   a control process for repeating the middle point value detecting process, when the absolute value of the difference detected in the middle point difference discriminating process is equal to or more than a specified value, after the corrected value of the record pulse is reset according to a sign (positive or negative) of the difference.   
     
     
       19. An optical recording device control method according to claim 18, wherein a series of processes started from the initial set-up process are executed just after power for the device is turned ON. 
     
     
       20. An optical recording device control method according to claim 18, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       21. An optical recording device control method according to claim 18, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       22. An optical recording device control method according to claim 18, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       23. An optical recording device control method according to claim 18, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       24. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, comprising: an initial set-up process for setting a corrected value of a record pulse in a specified initial value;   a middle point value detecting process for detecting a first middle point value corresponding to a middle point of an envelop of a regenerative signal for a first recording pattern, and a second middle point value corresponding to a middle point of an envelop of a regenerative signal for a second recording pattern, by recording the first recording pattern having a short record mark length and the second recording pattern having a long record mark length in a specified area of the optical recording medium respectively and regenerating the first recording pattern and the second recording pattern respectively;   a middle point value difference discriminating process for checking that an absolute value of a difference obtained by subtracting the first middle point value obtained in the middle point value checking process from the second middle point value is not more than a specified value; and   a control process for resetting, when the absolute value of the difference obtained in this middle point value discriminating process is equal to or larger than a specified value, the corrected value of the record pulse to a value smaller by a specified 1 step, if a sign of the above difference repeating the middle point value detecting process is positive, or to a value larger by a specified 1 step if the sign of the difference is negative, and then repeating the middle point value detecting process.   
     
     
       25. An optical recording device control method according to claim 24, wherein a series of processes started from the initial set-up process are executed just after power for the device is turned ON. 
     
     
       26. An optical recording device control method according to claim 24, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       27. An optical recording device control method according to claim 24, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       28. An optical recording device control method according to claim 24, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       29. An recording device control method according to claim 24, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       30. A method of controlling an recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation: comprising: an initial set-up process for setting a corrected value of a record pulse in a specified value;   an amplitude/middle point value detecting process for detecting a first amplitude value corresponding to an amplitude of a regenerative signal for a first recording pattern, and a second amplitude value corresponding to an amplitude of a regenerative signal for a second recording pattern, and for detecting a first middle point value corresponding to a middle point of an envelop of a regenerative signal for the first recording pattern and a second middle point value corresponding to a middle point of an envelop of a regenerative signal for the second recording pattern, by recording the first recording pattern having a short record mark length and the second recording pattern having a long record mark length in a specified area of the optical recording medium and regenerating the first recording pattern and the second recording pattern;   an amplitude value ratio discriminating process for checking that a quotient obtained by dividing the first amplitude value obtained in the amplitude/middle point value detecting process by the second amplitude value is equal to or more than a specified value;   a middle point difference discriminating process for checking that an absolute value of a difference obtained by subtracting the first middle point value obtained in the amplitude/middle point value detecting process from the second middle point value is not more than a specified value; and   a control process for resetting the corrected value of the record pulse and then repeating the amplitude/middle point value detecting process, when the quotient the is not more than the specified value in the amplitude value ratio discriminating process, and simultaneously when the absolute value of the difference obtained in the middle point difference discriminating process is not more than the specified value, according to a sign of the difference.   
     
     
       31. An optical recording device control method according to claim 30, wherein a series of processes started from the initial set-up process are executed just after power for the device is turned ON. 
     
     
       32. An optical recording device control method according to claim 30, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       33. An optical recording device control method according to claim 30, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       34. An optical recording device control method according to claim 30, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       35. An optical recording device control method according to claim 30, wherein series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one. 
     
     
       36. A method of controlling an optical recording device which uses an exchangeable optical recording medium as a recording medium, and which executes an operation to record data in a state where a pulse width of a record pulse has been corrected from a pulse width in record modulation, comprising: an initial set-up process for setting a corrected value of a record pulse in a specified value;   an amplitude/middle point value detecting process for detecting a first amplitude value corresponding to an amplitude of a regenerative signal for a first recording pattern, and a second amplitude value corresponding to an amplitude of a regenerative signal for a second recording pattern, and for detecting a first middle point value corresponding to a middle point of an envelop of a regenerative signal for the first recording pattern and a second middle point value corresponding to a middle point of an envelop of a regenerative signal for the second recording pattern by recording the first recording pattern having a short record mark length and the second recording pattern having a long record mark length in a specified area of the optical recording medium and regenerating the first recording pattern and the second recording pattern;   an amplitude value ratio discriminating process for checking that a quotient obtained by dividing the first amplitude value obtained in the amplitude/middle point value detecting process by the second amplitude value is equal to or more than a specified value;   a middle point difference discriminating process or checking that an absolute value of a difference obtained by subtracting the first middle point value obtained in the amplitude/middle point value detecting process from the second middle point value is not more than a specified value; and   a control process for resetting a corrected value of the record pulse, when the quotient obtained in the amplitude value ratio discriminating process is not more than the specified value, and simultaneously when the absolute value of the difference obtained in the middle point difference discriminating process is not less than the specified value, to a smaller value if the sign of the difference described above is positive, or to a larger value if the sign is negative.   
     
     
       37. An optical recording device control method according to claim 36, wherein a series of processes started from the initial set-up process are executed just after power for the device is turned ON. 
     
     
       38. An optical recording device control method according to claim 36, wherein a series of processes started from the initial set-up process are executed when a temperature in a driving system in the optical recording device is equal to or more than a specified value. 
     
     
       39. An optical recording device control method according to claim 36, wherein a series of processes started from the initial set-up process are executed once for every specified period of time while a driving system of the optical recording device is in operation. 
     
     
       40. An optical recording device control method according to claim 36, wherein a series of processes started from the initial set-up process are executed during down time of a controller for controlling a driving system in the optical recording device. 
     
     
       41. An optical recording device control method according to claim 36, wherein a series of processes started from the initial set-up process are executed each time an information recording medium in the optical recording medium is exchanged with a new one.